Posted by **diane** on Sunday, November 28, 2010 at 6:54pm.

need help with math 117 week 4 checkpoint

- math -
**Ms. Sue**, Sunday, November 28, 2010 at 6:57pm
If you post one or two of the questions and your answers, we'll be glad to check them for you.

- math -
**st**, Monday, August 22, 2011 at 9:38pm
1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by C=6,000/200-2x

a. What is the cost to remove 75% of the pollutant?

Answer: $120 million dollars

b. What is the cost to remove 90% of the pollutant?

Answer: $300 millions dollars

c. What is the cost to remove 99% of the pollutant?

Answer: $3 million dollars

d. For what value is this equation undefined?

e. Do the answers to sections a. through d. match your expectations? Explain why or why not.

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